Abstract
The paper explores the dependence of torsional modes of turbogenerator on the uncertainty in the shaft spring constant (stiffness). The analysis is performed on a typical single machine infinite bus system. Small-signal stability analysis as well as large-disturbance analysis are performed on five rotational mass mechanical system. Different operating conditions of the generator are examined. It is shown that the spring constant (stiffness) of the shaft can significantly influence damping and frequency of torsional modes. Effects on maximum torsional torques developed in the shaft following large disturbance in the electrical system are also analysed. The paper underlines the importance of accurate modelling of the turbine-generator shaft for studies of torsional oscillations and subsynchronous resonance. © 1997 IEEE.
| Original language | English |
|---|---|
| Pages (from-to) | 170-175 |
| Number of pages | 5 |
| Journal | IEEE Transactions on Energy Conversion |
| Volume | 13 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1998 |
Keywords
- damping
- oscillations
- stability
- subsynchronous resonance
- torsion
- turbogenerators
- five rotational mass mechanical system
- frequency
- large-disturbance analysis
- maximum torsional torques
- operating conditions
- shaft spring constant uncertainty
- single machine infinite bus system
- small-signal stability analysis
- stiffness
- torsional modes
- turbine-generator shaft
- turbogenerator